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How do I change a user password in Ubuntu Linux?
You can change a user password in Ubuntu Linux by using the passwd command. To change the password of the current user, simply run the following command in a terminal:rn rn rn passwdrn rn rnTo change the password of another user, you need to have root privileges. You can use the sudo command to r
How to install Skype on Debian Linux 9
You can install Skype on Debian Linux 9 by following these steps:rn rn Add the Skype repository to your sources list:rn rn Open a terminal window rn Run the following command: rn rn rn rn echo "deb https://repo.skype.com/deb stable main" | sudo tee /etc/apt/sources.list.d/skype-stable.listrn rn rn D
How do I become superuser on Ubuntu Linux using su/sudo?
To become a superuser (root user) on Ubuntu Linux, you can either use the su command or the sudo command.rn rn Using su :rn rn Open the terminal rn Type su and press Enter rn Enter the root user password when prompted rn You are now the superuser and your shell prompt should show a "#" symbol instea
How To Set up OpenVPN Server In 5 Minutes on Ubuntu Linux
Here are the steps to set up an OpenVPN server on Ubuntu Linux in 5 minutes:rn rn Install OpenVPN: rn rn rn rn sudo apt - get update rnsudo apt - get install openvpn easy - rsarn rn rn rn Copy the sample OpenVPN configuration files: rn rn rn rn sudo cp /usr/share/doc/openvpn/examples/sample-config-f
Linux Iptables Delete postrouting Rule Command
You can delete a specific iptables rule in the POSTROUTING chain using the following command:rn rn rn iptables -t nat -D POSTROUTING < rule_number > rn rn rnReplace <rule_number> with the number of the rule that you want to delete. You can find the rule number by using the iptables -t na
How to determine Linux guest VM virtualization technology
You can determine the virtualization technology used for a Linux guest virtual machine (VM) using the following methods:rn rn Check the output of the dmesg command: This command outputs the system log messages. If the Linux guest VM is running on a hypervisor, you may see messages from the virtualiz
How to install htop on pfSense firewall
Unfortunately, htop is not available in the default pfSense package repository, and installing it can be challenging as it requires a custom package to be built. However, you can use alternative tools such as top to monitor processes on pfSense firewall. Here is how to install top on pfSense:rn r
How To Setup Bridge (br0) Network on Ubuntu Linux 14.04 and 16.04 LTS
To set up a bridge network on Ubuntu Linux 14.04 and 16.04 LTS, follow these steps:rn rn Install the necessary packages: rn rn rn rn sudo apt - get update rnsudo apt - get install bridge - utilsrn rn rn rn Create a bridge interface file at /etc/network/interfaces : rn rn rn rn # Bridge interface rn
Ubuntu setup a bonding device and enslave two real Ethernet devices
To set up a bonding device and enslave two real Ethernet devices on Ubuntu, you need to follow these steps:rn rn Install the necessary packages: rn rn rn rn sudo apt - get update rnsudo apt - get install ifenslavern rn rn rn Load the bonding module: rn rn rn rn sudo modprobe bondingrn rn rn rn Creat
How to get Ethernet Link Speed in MAC OS X Through Command Prompt
You can get the Ethernet link speed on macOS through the Terminal using the following command:rn rn rn system_profiler SLEthernetDataType | grep "Link Speed" rn rn rnThis command uses the system_profiler utility to retrieve information about the Ethernet interface, and then filters the output for th
How To Setup Bonded (bond0) and Bridged (br0) Networking On Ubuntu LTS Server
To set up bonded (bond0) and bridged (br0) networking on Ubuntu LTS server, follow these steps: n n Install the necessary packages: n n n n sudo apt - get update nsudo apt - get install ifenslave n n n n Configure network interfaces: Edit the network interface configuration file, /etc/network/interf
How to install ZFS on Ubuntu Linux 16.04 LTS
To install ZFS on Ubuntu 16.04 LTS, follow these steps:rn rn Add the ZFS PPA repository: ZFS is not included in the default Ubuntu repositories, so you need to add the ZFS PPA repository to your system by running the following commands: rn rn rn rn sudo apt - get update rnsudo apt - get install soft
How to fix Httpoxy a CGI PHP/Nginx/Apache/Go application vulnerability on Linux or Unix
The Httpoxy vulnerability is a security issue that affects web applications that run in CGI environments, such as PHP, Nginx, Apache, and Go. Here's how to fix the Httpoxy vulnerability:rn rn Check for the vulnerability: To check if your web application is vulnerable, you can use a tool such as the
How to use multiple connections to speed up apt-get on Ubuntu Linux 16.04 LTS server with apt-fast
On Ubuntu 16.04 LTS, you can use the apt-fast tool to speed up apt-get by downloading packages in parallel from multiple connections. Here's how to use apt-fast :rn rn Install apt-fast : You can install apt-fast using the following command: rn rn rn rn sudo apt - get update rnsudo apt - get install
Linux how long a process has been running?
To see how long a process has been running on a Linux system, you can use the ps command with the -o and etime options. For example, to see the elapsed time for the process with PID 12345, run the following command:rn rn rn ps -o etime= - p 12345 rn rn rnThe etime option displays the elapsed time
How to set up a UFW firewall on Ubuntu 16.04 LTS server
To set up a UFW firewall on Ubuntu 16.04 LTS server, follow these steps:rn rn Install UFW: UFW (Uncomplicated Firewall) is not installed by default on Ubuntu 16.04. You can install it using the following command: rn rn rn rn sudo apt - get update rnsudo apt - get install ufwrn rn rn rn Enable the fi
How to create RAID 10 – Striped Mirror Vdev ZPool On Ubuntu Linux
To create a RAID 10 (Striped Mirror Vdev ZPool) on Ubuntu Linux, you can use the zpool command line utility. Here's the step-by-step process:rn rn Identify available disks: Before you create the RAID 10 array, you need to identify the available disks. You can use the lsblk command to list all the av
PHP-fpm Too Many Open Files 24 Error (set open file descriptor limit)
The "Too many open files" error can occur in PHP-fpm when the system limit for open file descriptors is reached. To resolve this issue, you can increase the limit for open file descriptors in the system. Here's how to increase the open file descriptor limit in PHP-fpm:rn rn Find the current open fil
How to configure pfSense as multi wan (DUAL WAN) load balance failover router
To configure pfSense as a dual WAN load balancing and failover router, you need to have two WAN connections and a pfSense firewall installed. Here are the steps to configure pfSense as a dual WAN load balancing and failover router:rn rn Login to the pfSense web interface and go to "System" -> "Ro
How to apply Debian security patches and updates
Debian provides security patches and updates for its systems through its package management system, "apt." To apply security patches and updates on a Debian system, you can follow these steps:rn rn Update the package list: Before you can install any updates, you need to have the latest package list.
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